Body-fluid-and-medication leak-proof and closed medical connector

ABSTRACT

A body-fluid-and-medication leak-proof and closed medical connector has a first connecting assembly and a second connecting assembly. The first connecting assembly has a first sleeve and a first resilient valve. The first resilient valve tends to seal a first opening of the first sleeve. The second connecting assembly has a second sleeve and a second resilient valve. The second resilient valve tends to seal a second opening of the second sleeve. The two resilient valves can avoid leakage of the medication remaining in an injector and a vial, or remaining in a fluid infusion tube and a catheter. The two resilient valves also can seal in two directions to avoid leakage during connecting or separating the two connecting assemblies after supplying medication. Therefore, the transfer of the medication is more hygienic and safe, and the waste of medical resources is effectively reduced.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a medical injector, and moreparticularly to a needleless medical connector for a vial or a catheterinto a human body, and a needleless medical connector for a needle of aninjector or a fluid infusion tube.

2. Description of the Prior Arts

A medical injector is used to inject medication into a patient. Aconventional medical injector comprises a needle, which can inject themedication inside the injector into the patient. However, the needle isunsafe and may pierce another object and medical personnel mayaccidentally get stabbed by the needle. Accordingly, a needlelessmedical injector without using a needle has been developed. Duringsupply of medication, a needleless medical injector is connected to avial through a connector, so that the injector can extract themedication in the vial.

An ordinary connector comprises a first connecting assembly and a secondconnecting assembly. The first connecting assembly is used to connect aninjector or a fluid infusion tube. The second connecting assembly isused to connect a vial or a catheter. The first connecting assembly andthe second connecting assembly are connected to each other. The firstconnecting assembly comprises a resilient plug and an actuator. Theresilient plug selectively blocks an opening of the first connectingassembly for connecting to the second connecting assembly. The actuatorkeeps abutting the resilient plug, and the actuator selectivelyprotrudes out of the first connecting assembly. When the firstconnecting assembly and the second connecting assembly are connected toeach other, the second connecting assembly abuts and pushes theactuator, and the actuator moves to push and move the resilient plug. Sothe resilient plug does not block the opening of the first connectingassembly, and the first connecting assembly communicates with the secondconnecting assembly.

However, when the above-mentioned connector is used, the firstconnecting assembly and the second connecting assembly are separated.During the separation of the first connecting assembly and the secondconnecting assembly, a gap between the second connecting assembly andthe first connecting assembly is getting larger, but the secondconnecting assembly still abuts the actuator, such that the firstconnecting assembly is not closed yet, which makes the medication keepflowing into a space between the second connecting assembly and thefirst connecting assembly until the first connecting assembly and thesecond connecting assembly are fully separated and then the firstconnecting assembly and the second connecting assembly are respectivelyclosed. Therefore, some medication may remain in the opening of thefirst connecting assembly and an opening of the second connectingassembly. Particularly during the transfer of the medication, the firstconnecting assembly and the second connecting assembly may need to beseparated temporarily, which may cause more medication to remainoutside. The remaining medication may volatilize due to the contact withthe air or may directly contact the human body, and the medication maydeteriorate or the medication is harmful itself, which results ininfection to the human body. In other words, the leaked and exposedmedication is potentially dangerous for the user.

As a result, the conventional connector needs to be improved.

To overcome the shortcomings, the present invention provides abody-fluid-and-medication leak-proof and closed medical connector tomitigate or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide abody-fluid-and-medication leak-proof and closed medical connector toavoid some medication remaining on an outer surface of the needlelessclosed medical connector after used.

One of two ends of the body-fluid-and-medication leak-proof and closedmedical connector is detachably connected to an injector or a fluidinfusion tube, the other of the two ends of thebody-fluid-and-medication leak-proof and closed medical connector isdetachably connected to a vial or a catheter, thereby communicatingbetween the injector and the vial, or communicating between the fluidinfusion tube and the catheter. The body-fluid-and-medication leak-proofand closed medical connector comprises a first connecting assembly and asecond connecting assembly.

The first connecting assembly is detachably connected to the injector orthe fluid infusion tube, communicates with the injector or the fluidinfusion tube, and comprises a first sleeve and a first resilient valve.The first sleeve has a first end, a second end, and a first channel. Thefirst end is detachably connected to the injector or the fluid infusiontube. The first channel is formed through the first sleeve, extends fromthe first end of the first sleeve to the second end of the first sleeve,communicates with the injector or the fluid infusion tube, and forms afirst opening in the second end of the first sleeve. The first resilientvalve is mounted in the first channel and tends to seal the firstopening.

The second connecting assembly is detachably connected to the vial orthe catheter, communicates with the vial or the catheter, is detachablyconnected to the first connecting assembly, and comprises a secondsleeve, a connecting portion, and a second resilient valve. The secondsleeve has a first end, a second end, and a second channel. The firstend is detachably connected to the vial or the catheter. The second endis detachably connected to the second end of the first sleeve. Thesecond channel is formed through the second sleeve, extends from thefirst end of the second sleeve to the second end of the second sleeve,communicates with the vial or the catheter, and foil is a second openingin the second end of the second sleeve. The connecting portion ismounted in the second channel and has a closed end and at least onelateral hole. The at least one lateral hole is formed through a sidewall of the connecting portion, communicates with an inner space of theconnecting portion, and is disposed adjacent to the closed end of theconnecting portion. The second resilient valve is mounted in the secondchannel, and tends to seal the second opening.

When the first connecting assembly and the second connecting assemblyare connected to each other, the first sleeve abuts the second resilientvalve to move the second resilient valve relative to the connectingportion to expose the at least one lateral hole of the connectingportion out of the second resilient valve. Simultaneously, the closedend of the connecting portion abuts the first resilient valve to openthe first opening such that the first connecting assembly and the secondconnecting assembly communicate with each other.

The first resilient valve, which tends to seal the first opening of thefirst sleeve, in the first sleeve of the first connecting assembly caneffectively avoid the leakage of the remaining medication in the firstconnecting assembly. Simultaneously, the second resilient valve, whichtends to seal the second opening of the second sleeve, in the secondsleeve of the second connecting assembly can effectively avoid theleakage of the remaining medication in the second connecting assembly.With the aforementioned structure, the needleless closed medicalconnector can effectively reduce the contact between the medication andthe air, and also reduce the medication remaining on outer surfaces ofthe first connecting assembly and the second connecting assembly toavoid bacterial breeding. Therefore, the transfer of the medication ismore hygienic and safe. In addition, by reducing the medicationremaining outside of the vial, the user can draw less medication fromthe vial with precious chemotherapy medications, thereby effectivelyreducing waste of medical resources.

Other objectives, advantages and novel features of the invention willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view in partial section of a first embodiment of abody-fluid-and-medication leak-proof and closed medical connector inaccordance with the present invention, showing a first connectingassembly and a second connecting assembly connected with each other;

FIG. 2 is an enlarged view of FIG. 1;

FIG. 3 is a front view in partial section of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 1, showing the first connecting assembly and the second connectingassembly separating;

FIGS. 4 and 6 are enlarged views of FIG. 3;

FIG. 5 is a front view in partial section of the second connectingassembly of another embodiment of a body-fluid-and-medication leak-proofand closed medical connector in accordance with the present invention;

FIG. 7 is a front view in partial section of the first connectingassembly of another embodiment of a body-fluid-and-medication leak-proofand closed medical connector in accordance with the present invention;

FIG. 8 is a front view in partial section of the first connectingassembly of a second embodiment of a body-fluid-and-medicationleak-proof and closed medical connector in accordance with the presentinvention;

FIGS. 9 and 10 are front views in partial section of the firstconnecting assembly of a third embodiment of a body-fluid-and-medicationleak-proof and closed medical connector in accordance with the presentinvention;

FIG. 11 is a front view in partial section of the first connectingassembly of a fourth embodiment of a body-fluid-and-medicationleak-proof and closed medical connector in accordance with the presentinvention;

FIG. 12 is a front view in partial section of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 1, shown connected to a fluid infusion tube;

FIG. 13 is a front view in partial section of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 1, shown connected to a diverter;

FIG. 14 is a front view in partial section of the first connectingassembly of a fifth embodiment of a body-fluid-and-medication leak-proofand closed medical connector in accordance with the present invention;

FIG. 15 is a front view in partial section of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 14, showing the first connecting assembly and the second connectingassembly connected with each other;

FIG. 16 is a front view in partial section of the first connectingassembly of a sixth embodiment of a body-fluid-and-medication leak-proofand closed medical connector in accordance with the present invention;

FIG. 17 is a front view in partial section of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 16, showing the first connecting assembly and the second connectingassembly connected with each other; and

FIG. 18 is a top view of a resilient spacer of thebody-fluid-and-medication leak-proof and closed medical connector inFIG. 16.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to FIGS. 1, 2, and 6, a body-fluid-and-medicationleak-proof and closed medical connector in accordance with the presentinvention has two ends. One of the two ends is detachably connected toan injector A, and the other end is detachably connected to a vial B,thereby communicating between the injector A and the vial B. Thebody-fluid-and-medication leak-proof and closed medical connector inaccordance with the present invention further comprises a firstconnecting assembly 10 and a second connecting assembly 20.

The first connecting assembly 10 is detachably connected to the injectorA and communicates with the injector A. The first connecting assembly 10has a first sleeve 11 and a first resilient valve 12.

The first sleeve 11 has a first end, a second end, and a first channel111, and the first sleeve 11 optionally has a positioning recess 112and/or an accommodating recess 113B as shown in FIG. 9 and in the thirdpreferred embodiment. The first end is detachably connected to theinjector A, and may be connected to the injector A by threads orengagement. The first channel 111 is formed through the first sleeve 11,extends from the first end to the second end, and communicates with theinjector A. The first channel 111 forms a first opening 1110 in thesecond end. The positioning recess 112 is formed in the first sleeve 11,and surrounds and communicates with the first channel 111. In apreferred embodiment, the first sleeve 11 has a first sleeve unit 11 aand a second sleeve unit 11 b. The first sleeve unit 11 a is detachablyconnected to the injector A. The second sleeve unit 11 b is mountedsecurely on the first sleeve unit 11 a. In other words, the first sleeveunit 11 a forms the first end of the first sleeve 11, and the secondsleeve unit 11 b forms the second end of the first sleeve 11. The firstchannel 111 is formed through the first sleeve unit 11 a and the secondsleeve unit 11 b, and the first opening 1110 is formed in the secondsleeve unit 11 b.

The first resilient valve 12 is mounted in the first channel 111, andtends to seal the first opening 1110. The first resilient valve 12 has aplated portion 121 and a plug post 122, and optionally has a positioningportion 123 and a flexing portion 124B as shown in FIG. 9 and in thethird preferred embodiment. The plated portion 121 is clamped betweenthe first sleeve unit 11 a and the second sleeve unit 11 b, and thus thefirst resilient valve 12 is fixed in position. The plated portion 121may be made of a resilient material, and has multiple communicatingholes 1211 to communicate between both sides of the first channel 111.The plug post 122 is mounted securely on the plated portion 121, and ismounted in the second sleeve unit 11 b to selectively seal the firstopening 1110. To be specific, the plug post 122 is made of a resilientmaterial, and optionally has a necked portion 1220. The necked portion1220 is a portion that has smaller sectional area relative to otherportions of the plug post 122, thereby enlarging the bending of the plugpost 122 when receiving an external force, which ensures the firstopening 1110 will be opened when the plug post 122 is bent. In apreferred embodiment, the necked portion 1220 has a notch formed in aside surface of the plug post 122, but the necked portion 1220 may beformed in other shapes.

The specific embodiments of the first sleeve 11 and the first resilientvalve 12 are as follows:

With reference to FIG. 6, in the first preferred embodiment, the secondsleeve unit 11 b of the first sleeve 11 has the positioning recess 112,and the first resilient valve 12 has the positioning portion 123. Thepositioning recess 112 not only surrounds the first channel 111 m butalso surrounds the plug post 122. The positioning recess 112 may beformed in an inner wall of the second sleeve unit 11 b, and extendsalong a lengthwise direction of the first channel 111. The positioningportion 123 also surrounds the plug post 122, and has two ends. One ofthe two ends is connected to the plated portion 121, and the other endis positioned in the positioning recess 112. The positioning portion 123keeps the first resilient valve 12 in a center of the first channel 111after the first resilient valve 12 is bent.

In a preferred embodiment, the plug post 122 is made of a resilientmaterial and has a necked portion 1220. The plug post 122 may beimplemented without the necked portion 1220 as shown in FIG. 7. Thenecked portion 1220 may have a notch formed in the side surface of theplug post 122, and thus the necked portion 1220 is smaller in width thanother portions of the plug post 122. Preferably, the notch of the neckedportion 1220 is disposed adjacent to the plated portion 121. In apreferred embodiment, the positioning portion 123 is shaped as a sleeveand mounted securely in the positioning recess 112. However, in anotherpreferred embodiment, the positioning portion 123 may be protruding ribsor protrusions, as long as the positioning portion 123 can be fixed inthe positioning recess 112. Due to the first sleeve unit 11 a and thesecond sleeve unit 11 b clamping the plated portion 121, the positioningportion 123 mounted in the positioning recess 112, and the resilientplug post 122, the plug post 122 can open the first opening 1110 whenreceiving an external force and can be recovered to seal the firstopening 1110 again when receiving no external force.

With reference to FIG. 8, in the second preferred embodiment, the firstsleeve 11 also has the positioning recess 112A, and the first resilientvalve 12 also has the positioning portion 123A. The positioning recess112A is also formed in an inner wall of the first channel 111, but thepositioning recess 112A extends along a direction perpendicular to thelengthwise direction of the first channel 111. The positioning portion123A may have an extending wall 1231A and a protruding rib1232A. Theextending wall 1231A may be shaped as a sleeve, and surrounds the plugpost 122. One of two ends of the extending wall 1231A is connected tothe plated portion 121. The protruding rib1232A extends from the otherend of the extending wall 1231A along a direction perpendicular to thelengthwise direction of the first channel 111, so that the platedportion 121 can be mounted securely in the positioning recess 112A.Compared with the preferred embodiment without the extending wall 1231A,the second preferred embodiment with the extending wall 1231A can havethe longer plug post 122, so that the bending of the plug post 122 isalso larger, thereby ensuring the plug post 122 can open the firstopening 1110 when bent.

With reference to FIGS. 9 and 10, in the third preferred embodiment, thefirst sleeve 11 also has the positioning recess 112B but further has anaccommodating recess 113B. The first resilient valve 12 also has thepositioning portion 123B but further has a flexing portion 124B. Thepositioning recess 112B, the positioning portion 123B and the plug post122 in the third preferred embodiment are similar to those in the firstpreferred embodiment, and thus are not repeated. The accommodatingrecess 113B surrounds the first channel 111 and communicates with thefirst channel 111. The accommodating recess 113B and the plug post 122are disposed on both sides of the plated portion 121 respectively. Oneof two ends of the flexing portion 124B is connected to the platedportion 121, and the other end is mounted in the accommodating recess113B. In a preferred embodiment, the plug post 122 may be made of anon-resilient material, and thus the first resilient valve 12 moves theplug post 122 by the deformation of the flexing portion 124B, therebyopening the first opening 1110. In another preferred embodiment, thefirst sleeve 11 may have the accommodating recess 113B only and withoutthe positioning recess 112B. In the same way, the first resilient valve12 has the flexing portion 124B only and does not have the positioningportion 123B.

With reference to FIG. 11, in the fourth preferred embodiment, the firstsleeve 11 also has the positioning recess 112C. The positioning recess112C is formed in the inner wall of the first channel 111, and extendsalong a direction perpendicular to the lengthwise direction of the firstchannel 111. The first resilient valve 12 may be implemented without thepositioning portion and the flexing portion, but the plated portion 121further has at least one annular recess 1212C. To be specific, theplated portion 121 is mounted securely in the positioning recess 112C,and has two annular recesses 1212C respectively formed in a top surfaceand a bottom surface of the plated portion 121 respectively.Furthermore, the plated portion 121 is made of a resilient material.Thus, when the plug post 122 receives an external force, the plug post122 and the plated portion 121 are both bent, thereby ensuring the plugpost 122 can open the first opening 1110 when bending.

In addition, in a preferred embodiment, the plated portion 121 may beimplemented without the annular recess, and the plug post 122 may beimplemented without the necked portion. In other words, the top surfaceand the bottom surface of the plated portion 121 may be parallel witheach other, and the plug post 122 may be a straight cylinder.

The following are still other preferred embodiments.

With reference to FIGS. 1 to 4, the second connecting assembly 20 isdetachably connected to the vial B, and communicates with the vial B.The second connecting assembly 20 is detachably connected to the firstconnecting assembly 10. The second connecting assembly 20 has a secondsleeve 21, a connecting portion 22, and a second resilient valve 23, andoptionally has a third resilient valve 24.

The second sleeve 21 has a first end, a second end, and a second channel211. The first end is detachably connected to the vial B, and the secondend is detachably connected to the second end of the first sleeve 11.The second channel 211 is formed through the second sleeve 21, extendsfrom the first end to the second end, and communicates with the vial B.The second channel 211 forms a second opening 2110 in the second end ofthe second sleeve 21. In a preferred embodiment, the second sleeve 21may have a third sleeve unit 21 a and a fourth sleeve unit 21 b. Thethird sleeve unit 21 a is detachably connected to the second sleeve unit11 b of the first sleeve 11. The fourth sleeve unit 21 b is mountedsecurely on the third sleeve unit 21 a, and is detachably connected tothe vial B. In other words, the third sleeve unit 21 a forms the firstend of the second sleeve 21, and the fourth sleeve unit 21 b forms thesecond end of the second sleeve 21. The second channel 211 is formedthrough the third sleeve unit 21 a and the fourth sleeve unit 21 b, andthe second opening 2110 is formed in the third sleeve unit 21 a.

The connecting portion 22 is mounted in the second channel 211, and in apreferred embodiment, the connecting portion 22 is movably mounted inthe second channel 211. The connecting portion 22 has an opening end221, a closed end 222, and a third channel 223. The third channel 223 isformed in the connecting portion 22, and extends from the opening end221 to the closed end 222. The closed end 222 of the connecting portion22 is selectively exposed, and has at least one lateral hole 224. Thelateral hole 224 is formed through a side wall of the connecting portion22 and communicates with the third channel 223. The lateral hole 224 isdisposed adjacent to the closed end 222, and thus the lateral hole 224is selectively exposed out with the closed end 222.

In a preferred embodiment, the connecting portion 22 optionally has aprotrusion 225. The protrusion 225 protrudes from the closed end 222 andprotrudes along a lengthwise direction of the connecting portion 22.

The second resilient valve 23 is mounted in the second channel 211, andselectively seals the second opening 2110. The second resilient valve 23has a first sealing portion 231 and a first surrounding portion 232. Thefirst sealing portion 231 is disposed in the second opening 2110 of thesecond sleeve 21, and a periphery of the first sealing portion 231selectively seals and abuts the second opening 2110. The first sealingportion 231 has a first resilient opening 2310. The first resilientopening 2310 is selectively mounted around the side wall of theconnecting portion 22, or the first resilient opening 2310 is closeditself.

One of two ends of the first surrounding portion 232 is mounted on thefirst sealing portion 231, and the other end abuts the connectingportion 22. In a preferred embodiment, the first surrounding portion 232and the first sealing portion 231 are formed integrally. But in anotherpreferred embodiment, the first surrounding portion 232 and the firstsealing portion 231 may be two separate components, and the firstsurrounding portion 232 abuts the first sealing portion 231. The firstsurrounding portion 232 is made of a resilient material to dispose thefirst sealing portion 231 in the second opening 2110, so that the firstsealing portion 231 seals the second opening 2110 and the firstresilient opening 2310 is closed itself.

The third resilient valve 24 is mounted in the second channel 211, andselectively blocks the second channel 211. In a preferred embodiment,the third sleeve unit 21 a and the fourth sleeve unit 21 b clamp thethird resilient valve 24 securely. The third resilient valve 24 has asecond sealing portion 241 and optionally has a second surroundingportion 242. The second sealing portion 241 is mounted in the secondchannel 211, and a periphery of the second sealing portion 241 seals andabuts an inner wall of the second channel 211. The second sealingportion 241 has a second resilient opening 2410. The second resilientopening 2410 is selectively mounted around the connecting portion 22,and can be closed itself to block the second channel 211.

One of two ends of the second surrounding portion 242 is mounted on thesecond sealing portion 241, and the other end abuts the connectingportion 22. In a preferred embodiment, the second surrounding portion242 and the second sealing portion 241 are formed integrally. But inanother preferred embodiment, the second surrounding portion 242 and thesecond sealing portion 241 may be two separate units, and the secondsurrounding portion 242 abuts the second sealing portion 241. The secondsurrounding portion 242 is made of a resilient material, which makes theclosed end 222 of the connecting portion 22 tend to keep adjacent to thesecond opening 2110 of the second channel 211, and also prevents theconnecting portion 22 from mounting through the second sealing portion241.

With reference to FIG. 5, in still another preferred embodiment, thesecond connecting assembly 20D is similar to the aforementioned secondconnecting assembly 20 as shown in FIG. 4. The difference is that theconnecting portion 22D is mounted securely in the second sleeve 21D, andthus the connecting portion 22D is unmovable relative to the secondsleeve 21D. Besides, the second connecting assembly 20D does not havethe third resilient valve, and only has the second resilient valve 23D.The second resilient valve 23D also surrounds the connecting portion 22Dand selectively seals the second opening 2110 of the second sleeve 21D,thereby reducing the components of the second connecting assembly 20D tofacilitate manufacture.

With the aforementioned structure, when dispensing the medication,separate the first connecting assembly 10 and the second connectingassembly 20 first, and then mount the first connecting assembly 10 onthe injector A, and mount the second connecting assembly 20 on the vialB. At this time, the resilience of the first resilient valve 12 makesthe plug post 122 of the first resilient valve 12 seal the first opening1110 of the first sleeve 11, thereby blocking the first channel 111 ofthe first sleeve 11. As a result, the medication cannot flow into thefirst connecting assembly 10 from the first opening 1110.

As the same time, the resilience of the second resilient valve 23 makesthe first sealing portion 231 of the second resilient valve 23 disposedin the second opening 2110 of the second sleeve 21, and the connectingportion 22 is not mounted through the first resilient opening 2310 ofthe first sealing portion 231, so that the first resilient opening 2310is closed, and the medication cannot flow into the second sleeve 21 fromthe second opening 2110. Simultaneously, the protrusion 225 of theconnecting portion 22 points to the first resilient opening 2310 or ismounted in the first resilient opening 2310. But the protrusion 225 doesnot open the first resilient opening 2310.

On the other hand, the resilience of the third resilient valve 24 makesthe second surrounding portion 242 of the third resilient valve 24 abutagainst the connecting portion 22, so that the closed end 222 of theconnecting portion 22 tends to keep adjacent to the second opening 2110of the second channel 211, and also prevents the connecting portion 22from mounting through the second resilient opening 2410 of the secondsealing portion 241 of the third resilient valve 24. As a result, thesecond resilient opening 2410 is closed, and the medication cannot passthrough the third resilient valve 24.

Then, connect the first connecting assembly 10 and the second connectingassembly 20, which makes the first sleeve 11 abut the second resilientvalve 23. The first sleeve 11 may abut the second resilient valve 23 invarious manners. For example, the first sleeve 11 pushes the firstsealing portion 231 of the second resilient valve 23 via the side wallof the first channel 111, thereby pressing the first surrounding portion232 of the second resilient valve 23 to be deformed. Therefore, thefirst sealing portion 231 moves along the connecting portion 22, opensthe first resilient opening 2310, and moves downward along theconnecting portion 22, which exposes the closed end 222 and the lateralhole 224 of the connecting portion 22 out of the first sealing portion231. Besides, the protrusion 225 also facilitates mounting theconnecting portion 22 through the first resilient opening 2310.

In a preferred embodiment that the connecting portion 22 is moveable,the connecting portion 22 is abutted against the second resilient valve23 and the third resilient valve 24 simultaneously. Thus, when the firstsleeve 11 abuts the second resilient valve 23, the second resilientvalve 23 abuts the connecting portion 22, and the connecting portion 22abuts the third resilient valve 24, so that the third resilient valve 24is deformed, and the connecting portion 22 moves toward the vial B. Tobe specific, the connecting portion 22 moves until the opening end 221of the connecting portion 22 is mounted through the second resilientopening 2410, thereby the second channel 211 and the third channel 223communicating with each other.

On the other hand, when the first connecting assembly 10 and the secondconnecting assembly 20 are connected to each other, the exposedconnecting portion 22 will mount through the first opening 1110 and intothe first channel 111 of the first sleeve 11, and abut the firstresilient valve 12, so that the first resilient valve 12 is deformed andopen the first opening 1110. To be specific, when the connecting portion22 is mounted into the first channel 111, the connecting portion 22abuts the first resilient valve 12 via the protrusion 225, which makesthe first resilient valve 12 deformed and then open the first opening1110. For example, as in the aforementioned first preferred embodiment,the plug post 122 of the first resilient valve 12 can be deformed by theabutting of the connecting portion 22. So the first opening 1110 stillcan be opened even though the plated portion 121 of the first resilientvalve 12 stays in the original position. Or as in the aforementionedfourth preferred embodiment, the flexing portion 124B of the firstresilient valve 12 can be deformed by the abutment of the connectingportion 22 against the plug post 122, which makes the plug post 122 movetoward the injector A and open the first opening 1110. When the firstopening 1110 is opened, the first channel 111 and the third channel 223communicate with each other.

At this time, the first channel 111, the second channel 211, and thethird channel 223 communicate with each other, so that the medication inthe vial B can flow into the second channel 211, the third channel 223,the first channel 111, and finally into the injector A in sequence.

When finishing the transfer of the medication, separate the firstconnecting assembly 10 and the second connecting assembly 20. During theseparating, the side wall of the first channel 111 gradually moves outof the second channel 211, and the first sealing portion 231 of thesecond resilient valve 23 moves toward the first connecting assembly 10and keeps abutting against an edge of the first opening 1110 of thefirst channel 111. Simultaneously, the connecting portion 22 keepsstaying in the first resilient opening 2310 of the first sealing portion231. As a result, a gap between the first channel 111 and the secondchannel 211 will not expand during the separating.

When the first connecting assembly 10 and the second connecting assembly20 further separate, the first sealing portion 231 keeps moving towardthe first connecting assembly 10 and covers the lateral hole 224 of theconnecting portion 22, thereby isolating the first channel 111 and thethird channel 223. Afterwards, the first sealing portion 231 covers theprotrusion 225 to stop the protrusion 225 abutting the plug post 122. Atthis time, the connecting portion 22 is fully covered by the firstsealing portion 231, and the first resilient opening 2310 is fullyclosed. The first resilient valve 12 does not receive any external forceand then is recovered to seal the first opening 1110.

Afterwards, when the side wall of the first channel 111 is moving out ofthe second channel 211, the first sealing portion 231 keeps movingtoward the second opening 2110. When the side wall of the first channel111 fully moves out of the second channel 211, the first sealing portion231 also moves to the second opening 2110 and seals the second opening2110. At this time, the first connecting assembly 10 and the secondconnecting assembly 20 are fully separated. As a result, the medicationremaining in the first sleeve 11 will not flow out of the first opening1110, and there will be no medication remaining outside of the firstsleeve 11. At the same time, the third resilient valve 24 is recoveredand blocks the second channel 211, thereby strengthening the closing ofthe inner side of the second connecting assembly 20, which prevents themedication from flowing back to the second sleeve 21 from the vial B.

As a result, during the separating of the first connecting assembly 10and the second connecting assembly 20, the first sealing portion 231will cover the lateral hole 224 first, which prevents the medicationfrom flowing into the first channel 111 via the lateral hole 224. Then,the first sealing portion 231 covers the protrusion 225, and theprotrusion 225 and the first resilient valve 12 are separated, whichmakes the first resilient valve 12 seal the first opening 1110, so thatthe medication will not flow back to the second connecting assembly 20from the first opening 1110. During the subsequent separating, the firstsealing portion 231 keeps abutting against the side wall of the firstchannel 111, so that no gap will be formed between the first sealingportion 231 and the first opening 1110 to accommodate medication. As aresult, when the first connecting assembly 10 and the second connectingassembly 20 are fully separated, the first sealing portion 231 willimmediately seal the second opening 2110, thereby avoiding medicationremaining in the first opening 1110 and the second opening 2110.

With reference to FIGS. 12 and 13, the present invention not only canconnect the injector and the vial, but also can connect a fluid infusionbag C1 and a human body. To be specific, two ends of a fluid infusiontube C2 are respectively connected to the fluid infusion bag C1 and thefirst connecting assembly 10, thereby communicating between the fluidinfusion bag C1 and the first connecting assembly 10. Similarly, one oftwo ends of a catheter D is installed with a needle (not shown in thedrawings), and the other end is connected to the second connectingassembly 20. The catheter D is for connecting to a human body. The fluidinfusion tube C2 can directly communicate with the fluid infusion bag C1and the first connecting assembly 10 as shown in FIG. 12, or the fluidinfusion tube C2 can be connected to the fluid infusion bag C1 via adiverter C3 as shown in FIG. 13 to receive two kinds of the medications.In addition, if the second connecting assembly 20 is not connected tothe vial, a bottom end of the second connecting assembly 20 can beformed with one single or multiple tube-connecting portions 25E tosimultaneously connect to multiple catheters D as shown in FIG. 12rather than formed with threads for the vial B as shown in FIG. 1.

To sum up, two ends of the present invention can be respectivelyconnected to an injector A and a vial B, so that the medication in thevial B can flow into the injector A via the present invention. Inaddition, after transferring the medication, the first connectingassembly 10 and the second connecting assembly 20 of the presentinvention can be separated. The first resilient valve 12 in the firstsleeve 11 of the first connecting assembly 10 tends to seal the firstopening 1110 of the first sleeve 11, thereby avoiding the leakage of themedication remaining in the first connecting assembly 10. At the sametime, the second resilient valve 23 in the second sleeve 21 of thesecond connecting assembly 20 tends to seal the second opening 2110,thereby avoiding the leakage of the medication remaining in the secondconnecting assembly 20.

The aforementioned means of sealing, i.e. sealing the first opening 1110first and then sealing the second opening 2110, can effectively reducethe contact between the medication and the air, and also reduce themedication remaining on outer surfaces of the first connecting assemblyand the second connecting assembly to prevent the remaining medicationcontacting the human body. Therefore, the transfer of the medication ismore hygienic and safe. In addition, by reducing the medicationremaining outside of the vial, the user can draw appropriate dose ofprecious chemotherapy medication from the vial, thereby effectivelyreducing waste of medical resources.

In addition, a fifth embodiment as shown in FIGS. 14 and 15 is similarto the aforementioned first embodiment, but there are two differencesbetween the two embodiments.

First, in the first embodiment, the first connecting assembly 10 and thesecond connecting assembly 20 are connected with each other by threads.But in the fifth embodiment, the first connecting assembly 10 and thesecond connecting assembly 20 are connected by engaging withoutrotating. To be precise, the first sleeve 11 further has a firstengaging portion 114E formed on an outer surface of the first sleeve 11.The second sleeve 21 further has a second engaging portion 212E formedon an outer surface of the second sleeve 21. The second engaging portion212E selectively engages with the first engaging portion 114E to connectthe first connecting assembly 10 and the second connecting assembly 20.That is, the first connecting assembly 10 can be moved toward the secondconnecting assembly 20 until the engaging portion 114E engages with thesecond engaging portion 212E, which fixes and prevents the firstconnecting assembly 10 and the second connecting assembly 20 fromseparating.

In a preferred embodiment, the first engaging portion 114E comprisesmultiple engaging hooks 1141E connected to the outer surface of thefirst sleeve 11. Each one of the engaging hooks 1141E is elongated, andtwo opposite ends of the engaging hook 1141E are respectively a pressingend and an engaging end. The engaging end is proximal to the secondconnecting assembly 20 relative to the pressing end. When the pressingend is pressed, the engaging end will be lifted up. The second engagingportion 212E comprises an annular flange 2121E formed on the outersurface of the second sleeve 21. The annular flange 2121E selectivelyengages with the engaging ends of the engaging hooks 1141E.

When the first connecting assembly 10 is moved toward the secondconnecting assembly 20, the engaging ends of the engaging hooks 1141Emay be pushed outward by the annular flange 2121E due to slopes of theannular flange 2121E and the engaging ends. After passing the annularflange 2121E, the engaging hooks 1141E is recovered and engage a bottomperiphery of the annular flange 2121E. To separate the first connectingassembly 10 and the second connecting assembly 20, just press thepressing ends of the engaging hooks 1141E, and then the first connectingassembly 10 can be moved upward from the second connecting assembly 20.

However, the first engaging portion 114E and the second engaging portion212E may be implemented with other structures or shapes.

Second, in the fifth embodiment, the first connecting assembly 10further comprises a fourth resilient valve 13E. The fourth resilientvalve 13E surrounds the first channel 111, selectively wraps around thesecond end of the first sleeve 11 to seal the first opening 1110. Whenthe first connecting assembly 10 and the second connecting assembly 20are connected to each other, the second end of the second sleeve 21abuts the fourth resilient valve 13E to move the fourth resilient valve13E relative to the first sleeve 11 to expose the first opening 1110 outof the fourth resilient valve 13E.

Therefore, the first opening 1110 is not only sealed by the block of thefirst resilient valve 12 from the inside of the first channel 111, butalso sealed by the wrapping of the fourth resilient valve 13E, whichfurther strengthens the sealing of the first opening 1110.

In addition, a sixth embodiment as shown in FIGS. 16 to 17 is similar tothe aforementioned fifth embodiment, but there is a difference betweenthe two embodiments.

The sixth embodiment has no fourth resilient valve 13E but has aresilient spacer 14F instead. The resilient spacer 14F surrounds thefirst channel 111 and abuts the first sleeve 11 toward the first end ofthe first sleeve 11. When the first connecting assembly 10 and thesecond connecting assembly 20 are connected to each other, the secondend of the second sleeve 21 abuts against the resilient spacer 14F, andthe resilient spacer 14F is clamped between the second sleeve 21 and thefirst sleeve 11 along a lengthwise direction of the first channel 111,thereby strengthening the sealing of infusion and toxic gas fromhazardous drugs, completely prevent leakage during using.

In a preferred embodiment, the first sleeve 11 further has multiplefixing ribs 115F formed on an inner wall of the first sleeve 11. Theresilient spacer 14F further has multiple fixing recesses 141F formed inan annular wall of the resilient spacer 14F. The fixing recesses 141Frespectively engage with the fixing ribs 115F of the first sleeve 11, sothat the resilient spacer 14F is mounted on the first sleeve 11. But theresilient spacer 14F may be connected to the first sleeve 11 by otherstructure.

Even though numerous characteristics and advantages of the presentinvention have been set forth in the foregoing description, togetherwith details of the structure and features of the invention, thedisclosure is illustrative only. Changes may be made in the details,especially in matters of shape, size, and arrangement of parts withinthe principles of the invention to the full extent indicated by thebroad general meaning of the terms in which the appended claims areexpressed.

What is claimed is:
 1. A body-fluid-and-medication leak-proof and closedmedical connector, one of two ends of the body-fluid-and-medicationleak-proof and closed medical connector detachably connected to aninjector or a fluid infusion tube, the other of the two ends of thebody-fluid-and-medication leak-proof and closed medical connectordetachably connected to a vial or a catheter, thereby communicatingbetween the injector and the vial, or communicating between the fluidinfusion tube and the catheter; the body-fluid-and-medication leak-proofand closed medical connector comprising: a first connecting assemblydetachably connected to an injector or a fluid infusion tube,communicating with the injector or the fluid infusion tube, andcomprising a first sleeve having a first end detachably connected to theinjector or the fluid infusion tube; a second end; and a first channelformed through the first sleeve, extending from the first end of thefirst sleeve to the second end of the first sleeve, communicating withthe injector or the fluid infusion tube, and forming a first opening inthe second end of the first sleeve; and a first resilient valve mountedin the first channel and selectively sealing the first opening; thefirst resilient valve comprising: a plated portion having multiplecommunicating holes formed through the plated portion between two endsof the first channel; and a plug post mounted securely on the platedportion, selectively sealing the first opening, a length of the plugpost being larger than a width of the plug post, and the plug posthaving a necked portion between two ends of the plug post; and a secondconnecting assembly detachably connected to a vial or a catheter,communicating with the vial or the catheter, detachably connected to thefirst connecting assembly, and comprising a second sleeve having a firstend detachably connected to the vial or the catheter; a second enddetachably connected to the second end of the first sleeve; and a secondchannel formed through the second sleeve, extending from the first endof the second sleeve to the second end of the second sleeve,communicating with the vial or the catheter, and forming a secondopening in the second end of the second sleeve; a connecting portionmounted in the second channel and having a closed end; and at least onelateral hole formed through a side wall of the connecting portion,communicating with an inner space of the connecting portion, anddisposed adjacent to the closed end of the connecting portion; and asecond resilient valve mounted in the second channel, and selectivelysealing the second opening; wherein when the first connecting assemblyand the second connecting assembly are connected to each other, thefirst sleeve abuts the second resilient valve to move the secondresilient valve relative to the connecting portion to expose the atleast one lateral hole of the connecting portion out of the secondresilient valve; simultaneously, the closed end of the connectingportion abuts the first resilient valve to open the first opening suchthat the first connecting assembly and the second connecting assemblycommunicate with each other; the plug post is made of a resilientmaterial and thus is bent due to the necked portion abutting against theconnecting portion and thereby the first opening is opened.
 2. Thebody-fluid-and-medication leak-proof and closed medical connector asclaimed in claim 1, wherein the connecting portion further comprises aprotrusion protruding from the closed end of the connecting portion, andprotruding along a lengthwise direction of the connecting portion. 3.The body-fluid-and-medication leak-proof and closed medical connector asclaimed in claim 1, wherein the necked portion has a notch formed in aside surface of the plug post.
 4. The body-fluid-and-medicationleak-proof and closed medical connector as claimed in claim 1, whereinthe first sleeve has a positioning recess surrounding the first channel;and the first resilient valve has a positioning portion surrounding theplug post, one of two ends of the positioning portion connected to theplated portion, and the other of the two ends of the positioning portionmounted in the positioning recess.
 5. The body-fluid-and-medicationleak-proof and closed medical connector as claimed in claim 4, whereinthe positioning recess extends along a direction perpendicular to alengthwise direction of the first channel; and the positioning portionhas an extending wall shaped as a sleeve and surrounding the plug post;one of two ends of the extending wall connected to the plated portion;and a protruding rib extending from the other end of the extending wallalong a direction perpendicular to the lengthwise direction of the firstchannel.
 6. The body-fluid-and-medication leak-proof and closed medicalconnector as claimed in claim 1, wherein the second connecting assemblyfurther comprises a third resilient valve mounted in the second channel,and selectively blocking the second channel; wherein when the firstconnecting assembly and the second connecting assembly are connected toeach other, the connecting portion of the second connecting assemblyabuts the third resilient valve to make the third resilient valve stopblocking the second channel.